BAKER HUGHES - Drilling Fluids Reference Manual

Oil / Synthetic Fluids
CARBO-TEC ® HW
CARBO-TEC ® HW is a non-ionic emulsifier for the CARBO-DRILL mineral oil-base fluid system. It
is compatible with all other products in the CARBO-DRILL system. CARBO-TEC HW has a strong
affinity for solid surfaces and provides a high degree of oil-wetting ability in any type mineral oil.
Treatment with CARBO-TEC HW will result in increased emulsion stability and lower plastic
viscosities, particularly in heavily solids-laden fluids. CARBO-TEC HW is used to treat fluids where
solids levels have risen to high levels and emulsion stability and rheological properties have been
compromised as a result. It is particularly effective in high water content oil-base fluids and in high
density fluids. Pilot testing is recommended in all cases to avoid over treatment. Over treatment can
result in settling of barite. Concentration levels will vary from 0.1 gal/bbl (2.0 L/m 3 ) in low-weight
systems to 0.5 gal/bbl (12.0 L/m 3 ) in high density, high solids systems.
Table 5-10 Typical Physical Properties – CARBO-TEC HW
Appearance
Dark brown liquid
Flash Point > 162°F (72°C )
Pour Point
Specific Gravity
< 14°F ( 10°C)
0.84 S.G. (7.0 lbm/gal)
CARBO-TEC ® S
CARBO-TEC ® S is an unsaturated polymerized fatty acid blend used to provide supplemental
emulsion stability in invert emulsion systems. CARBO-TEC S exhibits a high tolerance to
contaminants and high temperatures. CARBO-DRILL systems prepared with CARBO-TEC S have
been formulated to withstand temperatures in excess of 204ºC (400ºF). CARBO-TEC S is compatible
with a wide range of internal-phase salinities and can be used to help emulsify calcium chloride and
sodium chloride brines, seawater, and fresh water.
CARBO-TEC S is a supplemental emulsifier used in the controlled-filtration oil mud system.
CARBO-TEC S requires lime to function effectively, and is used in conjunction with CARBO-MUL
or CARBO-MUL HT and filtration control additives in these systems. CARBO-TEC S should be
added through the hopper or directly to the suction pit if sufficient agitation is available.
Concentrations up to 0.6 gal/bbl (14.3 L/m 3 ) may be required for controlled-filtrate mud systems.
Table 5-11
Appearance
Typical Physical Properties – CARBO-TEC S
Yellow-amber liquid
Flash Point >93º C (>200º F)
Density
955 kg/m 3 (7.9 lb/gal)
Baker Hughes Drilling Fluids
Reference Manual
5-34 Revised 2006